twin

twin (http://definr.com/twin)

     adj 1: being two identical [syn: duplicate, matching, twin(a),
             twinned]
     2: very similar [syn: siamese]
     n 1: either of two offspring born at the same time from the same
          pregnancy
     2: a waterfall in the Snake River in southern Idaho [syn: Twin,
         Twin Falls]
     3: a duplicate copy [syn: counterpart, similitude]
     v 1: duplicate or match; "The polished surface twinned his face
          and chest in reverse" [syn: duplicate, parallel]
     2: bring two objects, ideas, or people together; "This fact is
        coupled to the other one"; "Matchmaker, can you match my
        daughter with a nice young man?"; "The student was paired
        with a partner for collaboration on the project" [syn: match,
         mate, couple, pair]
     3: grow as twins, of crystals
     4: give birth to twins